Neither iText nor any other PDF producer has such an option, because it serves no useful purpose.
I still don't understand why it matters since the PDF is valid and processes correctly. Leonard On 9/11/12 5:30 AM, "Alvaro Cuno" <[email protected]> wrote: >Ok, if not is a pdf standard requirement, how can I set the fixed form >instead of the free form? that is it possible? ... I noticed the fact >because I was experimenting implement digital signatures using >multiple machines so I can use only local variables. > >Greats >- >Alvaro > > >On 10 September 2012 01:58, Leonard Rosenthol <[email protected]> wrote: >> Because object numbering and their location in a PDF are completely free >> form there are no requirements. >> >> Why does it matter? >> >> From: Alvaro Cuno <[email protected]> >> Reply-To: Post here <[email protected]> >> To: Post here <[email protected]> >> Subject: [iText-questions] are the dictionary elements randomly placed? >> >> >> Hello all, >> >> I signed a same file (hello.pdf) three times using the next code: >> >> public static void sign(String src, String dest) >> throws IOException, DocumentException, KeyStoreException, >> NoSuchAlgorithmException, CertificateException, >> UnrecoverableKeyException { >> >> Security.addProvider(new BouncyCastleProvider()); >> KeyStore ks = KeyStore.getInstance("pkcs12"); >> ks.load(new FileInputStream("citizen1.p12"), >> "password".toCharArray()); >> String alias = (String) ks.aliases().nextElement(); >> PrivateKey key = (PrivateKey) ks.getKey(alias, >> "password".toCharArray()); >> Certificate[] chain = ks.getCertificateChain(alias); >> >> PdfReader reader = new PdfReader(src); >> FileOutputStream os = new FileOutputStream(dest); >> PdfStamper stamper = PdfStamper.createSignature(reader, os, >>'\0', >> null, true); >> PdfSignatureAppearance appearance = >> stamper.getSignatureAppearance(); >> appearance.setAcro6Layers(true); >> appearance.setCrypto(key, chain, null, >> PdfSignatureAppearance.WINCER_SIGNED); >> appearance.setVisibleSignature(new Rectangle(160, 732, 232, >>780), 1, >> null); >> Calendar cal = Calendar.getInstance(); >> cal.setTime(new Date(0)); >> appearance.setSignDate(cal); >> stamper.close(); >> } >> >> Everything is ok and all digital signatures are valid, however I don't >> understand why the internal structures of the signed documents (see >>attached >> files) are different? >> >> >> hello-signed-1.pdf hello-signed-2.pdf hello-signed-3.pdf >> ... ... ... >> %%EOF %%EOF %%EOF >> ... ... ... >> 10 0 obj 10 0 obj 10 0 obj >> 11 0 obj 8 0 obj 11 0 obj >> 12 0 obj 11 0 obj 12 0 obj >> 8 0 obj 9 0 obj 9 0 obj >> 9 0 obj 12 0 obj 8 0 obj >> 5 0 obj 5 0 obj 5 0 obj >> ... ... ... >> >> >> The objects 8, 9 and 11 are related to /n0, /n2, /FRM fields, ... these >> were inserted randomly? if yes, why? >> >> - >> Alvaro >> >> >> >>------------------------------------------------------------------------- >>----- >> Live Security Virtual Conference >> Exclusive live event will cover all the ways today's security and >> threat landscape has changed and how IT managers can respond. >>Discussions >> will include endpoint security, mobile security and the latest in >>malware >> threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ >> _______________________________________________ >> iText-questions mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/itext-questions >> >> iText(R) is a registered trademark of 1T3XT BVBA. >> Many questions posted to this list can (and will) be answered with a >> reference to the iText book: http://www.itextpdf.com/book/ >> Please check the keywords list before you ask for examples: >> http://itextpdf.com/themes/keywords.php > >-------------------------------------------------------------------------- >---- >Live Security Virtual Conference >Exclusive live event will cover all the ways today's security and >threat landscape has changed and how IT managers can respond. Discussions >will include endpoint security, mobile security and the latest in malware >threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ >_______________________________________________ >iText-questions mailing list >[email protected] >https://lists.sourceforge.net/lists/listinfo/itext-questions > >iText(R) is a registered trademark of 1T3XT BVBA. >Many questions posted to this list can (and will) be answered with a >reference to the iText book: http://www.itextpdf.com/book/ >Please check the keywords list before you ask for examples: >http://itextpdf.com/themes/keywords.php ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ iText-questions mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/itext-questions iText(R) is a registered trademark of 1T3XT BVBA. Many questions posted to this list can (and will) be answered with a reference to the iText book: http://www.itextpdf.com/book/ Please check the keywords list before you ask for examples: http://itextpdf.com/themes/keywords.php
